Cheapest priced copy (Dominaria): $0.35 at Card Kingdom, near mint, their price list as of .
Navigator's Compass 
Artifact · Common · Dominaria · #225
When this artifact enters, you gain 3 life.
{T}: Until end of turn, target land you control becomes the basic land type of your choice in addition to its other types.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria | 225 | Common | $0.35 | $2.99 |
One ruling from Wizards of the Coast
- 27 April 2018Gaining a basic land type causes the target land to gain the corresponding mana ability. Because the new basic land type is “in addition to” its other types, it keeps the abilities it had previously.